/*
 * simes - simulador de escalonamento de processos
 * Copyright (C) 2006  Pablo A. Lerina Rodrigues
 *                     Armando Zaro
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#ifndef __STACK_H__
#define __STACK_H__

/*
 * nodo da pilha de comandos
 */
typedef struct stack_node {
	int comando;
	int valor;
	struct stack_node *up; // proximo elemento da pilha (em cima do atual)
	struct stack_node *down; // elemento anterior ao atual na pilha
}
t_snode;

/*
 * estrutura da pilha de comandos
 */
typedef struct stack {
	struct stack_node *base, *top;
}
t_stack;

t_snode *pop();
void push();

#endif
